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2x 200ah lifepo4 batteries

ken_lillia

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Jul 8, 2020
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I have 2 12 volt lifepo4 200ah batteries, prismatic cells. 4s configuration. they both have 150 amp BMS.
can I put the in parallel, if so what would be the maximum watts I could draw. Microwave, etc.
or would I be better of configuration of 2p4s. Cells are 200ah 3.2 volt prismatic cells.
 
What inverter do you plan to use? Sounds like 12V inverter type? The math works out 2560W per 4S configuration @ 12v. 2560x2 (Banks) = 5120W max watts. You have plenty of power to run the microwave. You can parallel them into the 12V inverter and each battery bank could draw max up to 150 amp per BMS specs. Total amp draw is 300 amp. Hope that helps.
 
you meant using one 250amp BMS with 4S2P configuration? Is the inverter 12V? It is doable if that's what you want. Normally, once you have so much power pass 2000Watts, it is recommended to go 24V @ 2000 Watts.

4S2P looks like this with one 250amp BMS:
11 22 33 44 (One bank, 4 series with 2 parallels.)

2P4S looks like this:
1234 (Bank 1) 150amp BMS take the terminal and connect to inverter for parallel or equalize the loads
1234 (Bank 2) 150amp BMS take the terminal and connect to inverter for parallel or equalize the loads
 
11 22 33 44 was what I was going to do in 12 volt. For RV (caravan) with enerdrive 2600 12 volt inverter.
 
11 22 33 44 was what I was going to do in 12 volt. For RV (caravan) with enerdrive 2600 12 volt inverter.
You will be fine. Just beef up on the wire size for at least 216 amps per the 2600w@12v inverter you have and the BMS wires.
 
Sorry is 4 s ok with 2 cells in parallel. Such as 11 one wire 22 one wire 33 one wire 44 one wire?
 
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